Time tricks: You bought it because it was handy based on the moment. Example: spend $1.50 on a bottle of water you could have brought along. Or, maybe you bought something because you adopted an attitude of my time is worth the money!
Ego tricks: You just have to keep up with everyone else, no matter what don't you! Your mind tricks you into believing your MORE (or less) of a person by always having the latest and greatest something no matter the fact you're 60 days past due on several accounts.